Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8817e28863e82db…

MALICIOUS

PDF

44.2 KB Created: 2020-07-25 18:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 9f8701bc4e2ccdf51f96fbdd67031b98 SHA-1: 9e8f27f9fcd7c406f7b522aa5492090e846978e8 SHA-256: d8817e28863e82db7fb09e867061c5bc5d9c7a5054011e494fcd002f0a95108a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a helpful resource. This suggests a phishing or social engineering attack aimed at directing users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/wb?keyword=how%20to%20add%20a%20pdf%20into%20a%20powerpoint%20presentation In PDF document text
    • http://files.landscapeaestheticsllc.com/uploads/1/3/2/6/132696112/pogemujejivobefazuwe.pdfIn PDF document text
    • http://files.sahms.net/uploads/1/3/0/7/130740123/zimufojetakajes-wazonexojural.pdfIn PDF document text
    • http://files.lavenderlanemi.com/uploads/1/3/2/6/132696263/302973682aa.pdfIn PDF document text
    • http://files.modernhomebuyers.us/uploads/1/3/2/7/132740767/vefalexolev-pidomif.pdfIn PDF document text
    • http://files.clanchildhealth.org/uploads/1/3/1/4/131452997/dagewugojoma.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/1/0431/5506/2938/files/11918543559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/fuxibupavemotupejeweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6187/0741/files/1299951638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/5673968677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/gikijekalividelijab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/954360366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/mabater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/zogogurafekata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7564/7128/files/49388963522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/fumaduzox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69298849274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9607/0549/files/durogibepedepozed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7093 4844 bytes
SHA-256: 58d0db53ab3b57b40836feba3e99d6881e1b319bd7669bf8091ea66280bb7dc7
font_01_sfnt_off0000811e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811E 9904 bytes
SHA-256: 8dd4151038b147a6e750d37c3a5e2b223cdda4f85a9a60fa87731d5675108bc7

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