Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c854d333ded359…

MALICIOUS

PDF

40.4 KB Created: 2020-08-02 20:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4606eb29fd6b48a870efa216149ba3e4 SHA-1: afddc8a6d21a65d2b2ecef67f06ded885d3c5111 SHA-256: 63c854d333ded35947da34778bcd128a84de6657c20bc47e69fd135205ffd5f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=4e+d%2526+d+pdf'. The presence of a large number of external PDF links suggests a link farm or redirection tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves tricking users into clicking the malicious link, which likely leads to a phishing page or malware download.

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=4e+d%2526+d+pdf
    • http://files.mtousleyphysie.com/uploads/1/3/1/4/131437949/danexonomewatakusov.pdf
    • http://files.friendsoftheanacorteslibrary.org/uploads/1/3/2/3/132303013/3009808.pdf
    • http://files.simoncdrew.com/uploads/1/3/0/9/130969986/siliwekavegex_xarobug.pdf
    • http://files.southcarolinamarijuanalaw.com/uploads/1/3/1/4/131453136/derulidesonexowos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/shopify_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/69291192757.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdf
    • https://cdn.shopify.com/s/files/1/0437/7739/2791/files/773627477.pdf
    • https://cdn.shopify.com/s/files/1/0433/9718/5701/files/83522505387.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/87945915232.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/2013_chevy_sonic_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/2599421324.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/11195273533.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/denovabadawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/49905314733.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_off0000569f.bin
4064d723e00c6bf89a152d24e59aad39cdbe6e73125042934ec098ddd44de289
pdf-font-stream PDF embedded font (sfnt) at offset 0x569F 4296 bytes
font_01_sfnt_off00006550.bin
cecb77bfc4481653d3e508a0248332b22d4875e15e379ae2b0711b587b365b3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 15048 bytes