Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f725a8dd97459b2…

MALICIOUS

PDF

50.3 KB Created: 2020-08-07 06:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a894ddf5e980f5296eb8843e6001024f SHA-1: e31273bfc4619352c21c41e1340d70d0d3d6fc9f SHA-256: 7f725a8dd97459b2bc0363b4c65c783960b4dc60f21be0b600b3934d9ba21bfb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, disguised as 'aloe vera medicinal properties pdf', redirects through 'ttraff.cc', a known malicious redirector. This suggests a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious 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.cc/pify?keyword=aloe+vera+medicinal+properties+pdf
    • http://files.whitneyhorrocksfineart.com/uploads/1/3/0/7/130740193/dfd8c03.pdf
    • http://files.litzmusic.com/uploads/1/3/1/3/131384286/gudapov_sajelulalarola.pdf
    • http://files.medicalpapyrus.com/uploads/1/3/0/9/130969545/6119258.pdf
    • http://files.ssmcommunitybaptistchurch.com/uploads/1/3/2/7/132712099/1333075.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/26761954016.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/guruxuxemuviwedujitepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/37581798120.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/wugoxeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/votagogoxarap.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/burorefubiwejugek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/11757677123.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/9449704064.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/ccna_1_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0436/9956/8795/files/budefalaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/95447656280.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084f0.bin
dfaf809e89db72b49c3c15b4e25d6dced435950233632256897e0aac2d87cf56
pdf-font-stream PDF embedded font (sfnt) at offset 0x84F0 5352 bytes
font_01_sfnt_off00009712.bin
4c9ae3d9d008e8c669647dd76cee4a2113bc9df68e21e824e48d422a93280a41
pdf-font-stream PDF embedded font (sfnt) at offset 0x9712 10892 bytes