Malicious PDF — malware analysis report

Static analysis result for SHA-256 101f3ed610035ff6…

MALICIOUS

PDF

48.4 KB Created: 2020-07-21 17:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: ce94287b3fa4b8f96995ff4bbc38e879 SHA-1: 25c860a2ec58bf09244eb128e7e26e92ffcb986b SHA-256: 101f3ed610035ff63849a23978e768360a19adab4ed05ed4889bd63a270eab58
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to redirector infrastructure, specifically `https://ttraff.ru/wb?keyword=pdf%20editor%20mac%20preview`, which is flagged as malicious. The document also includes an 'enable lure' heuristic, suggesting it attempts to trick users into enabling content to execute further malicious actions. The ML classifier strongly indicates maliciousness, and the presence of many external links points to a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=pdf%20editor%20mac%20preview In PDF document text
    • http://files.atplanned.com/uploads/1/3/2/6/132681436/bapupu.pdfIn PDF document text
    • http://files.westfielddentalpa.com/uploads/1/3/0/7/130775942/bavef_kezujuwusuk_javexolizepun.pdfIn PDF document text
    • http://files.sandywoodsmusic.com/uploads/1/3/2/6/132695986/javuguxozexaxa.pdfIn PDF document text
    • http://files.levitytherapeutics.com/uploads/1/3/0/7/130740051/kulazuduwiximifad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/tadoxedakupagasije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/liresezivizozibifev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/kejubiwibebib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/24344933960.pdfIn PDF document text
    • https://pitosabutage.files.wordpress.com/2020/07/bewirasamutoxatebovifow.pdfIn PDF document text
    • https://puwugeboje.files.wordpress.com/2020/07/butefa.pdfIn PDF document text
    • https://sofusobovax.files.wordpress.com/2020/06/tidusozetolitog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/xerafefaresutesin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/jopanivojelezadowaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/4167115301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/nupixugelemekuxexigulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/22306766576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/89777115491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/fadinenijukokinutam.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000808b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808B 4928 bytes
SHA-256: ab2f3313f7cb6d918b1fe9e3747da307adb92cfc73cdc03710c173b0c38d619d
font_01_sfnt_off0000915c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915C 10264 bytes
SHA-256: 9e13bfc8a4b869aae6113ef2acf80c050aba48befcffd0e6b1d3210b212356c1