Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3a923ab8dc2f92…

MALICIOUS

PDF

36.7 KB Created: 2020-07-30 14:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb5f16f682298cc66f2e23609a0f0fe7 SHA-1: ed838de0e122ab21f36751063d80e39611984be2 SHA-256: 8e3a923ab8dc2f928c7930b06b696d49ffd7970fdc355250361c799c5672d3b9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This indicates an attempt to lure the user to a malicious site, likely for phishing or malware distribution. The PDF also contains a large number of embedded links, many hosted on Shopify, which is characteristic of SEO spam or link farm techniques used to obscure malicious destinations. The ML classifier strongly flagged this PDF as malicious.

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=trial+and+death+of+socrates+hackett+pdf
    • http://files.beyondthebreast.com/uploads/1/3/0/7/130739142/goledenu-luzatigi-govofiwomeko-tokepevidipe.pdf
    • http://files.fantasysumo.us/uploads/1/3/1/4/131409305/1733129.pdf
    • http://files.metatalkcafe.com/uploads/1/3/1/4/131454586/woxifu-tebufepuf-gobetuwo-vudapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/3487558526.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8717/files/26751352916.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/82024838855.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/tetowewu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/likesigumawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/31839322576.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/kuvodixaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/tabotepemoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/86740796991.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/39733585421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005341.bin
30cfdb086e8282b607d4f9e68f79d0ccb856988417e4a8ebbe966055a82f6564
pdf-font-stream PDF embedded font (sfnt) at offset 0x5341 5044 bytes
font_01_sfnt_off00006458.bin
7bf3139f7f3a877d6e11b2351592cf9be53533c333d3fbf883aa05a0dfda97e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 9736 bytes