Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafc89fc0bf9d729…

MALICIOUS

PDF

73.7 KB Created: 2020-08-18 14:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df1409d61d405fdade2cc99256bf13ac SHA-1: 4d012df43fbb320edee99949ed54ddf6162dd693 SHA-256: fafc89fc0bf9d729ae1f0de7d2e8eb5e8c6c881e66d4ef6b6bcad6652aea08a2
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 'https://ttraff.com/pify?keyword=retracting+a+job+offer+template'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to drive traffic to this malicious site.

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=retracting+a+job+offer+template
    • http://files.sheuniquephotography.com/uploads/1/3/0/7/130775905/lusenuduvilox-xugomonajaju.pdf
    • http://files.parkheiser.com/uploads/1/3/1/6/131607237/jukabapijafu-dekereto-momegotomodot.pdf
    • http://lasosegud.marykaitlinartistry.com/uploads/1/3/1/0/131070420/0402f13c.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/71303038525.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/35296467895.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/51970933435.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/da_form_31.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/72781739766.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9009713252.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/88069966864.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/dekamometekusuxixelik.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c89d.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC89D 2828 bytes
font_01_sfnt_off0000d297.bin
cde5731823f6056589fb331c2de1c23f0353285097415e7b436e0e1a8793e660
pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 5168 bytes
font_02_sfnt_off0000e415.bin
676b4ea83d56cc11e7354358b0d34844e3ed77c5c276042ff1da50e5a6b09451
pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 12100 bytes
font_03_sfnt_off00010b61.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 4324 bytes