Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95cb2635c7d3d2c…

MALICIOUS

PDF

39.8 KB Created: 2020-08-01 21:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbe228c133a72c5bcc62ea5ece855980 SHA-1: edc865ab7891cbfcd2816174ccc2098e7d6a1447 SHA-256: a95cb2635c7d3d2cd1b303efee02c8a8e7a579f92fead3bee4398f9fb83bf7a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a redirector URL and a large number of other links suggests a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=love+come+down+lyrics
    • http://files.foundationforhopeinafrica.org/uploads/1/3/0/7/130775728/damapapifafefan-fuwexifibanaxi-ranuz.pdf
    • http://files.bondurantfundraisingfriends.org/uploads/1/3/1/0/131070051/c9c8adab274bf0.pdf
    • http://files.jakewalkerussf.com/uploads/1/3/2/7/132710592/sojig-bisojez-nilefuxipazomeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/wimurewaboziviberarewet.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/angel_fire_ammo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/97868452230.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/xenavev.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/garigavigizivadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/10781337151.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/65160415105.pdf
    • https://cdn.shopify.com/s/files/1/0434/8071/1325/files/39479099254.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/22865245249.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/26864143990.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/zesaxuluvawegipubexoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/xisimulisudo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb0.bin
8a76baa7ee5b654a3179144dd02c424a2bca3e7a8b0da3a8c4117683ba7bfcef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 5068 bytes
font_01_sfnt_off00006ff7.bin
f94048b1352fa8d89f97e06ad77660aa5026641752fea02e2c94126b0f1d7b5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF7 10228 bytes