Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1646ea41b44eb5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 14:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a23fe25ea4df28fbac9dbb3c4905db3 SHA-1: 0833da554accbe1f4a49b8cb0af691f5d2c9dc0c SHA-256: 7e1646ea41b44eb588a3e79c9b1342a895027a32dd15148bd18e256b847101da
150 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=brescia+stadium+guide'. This link is presented within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains hosting other PDFs. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=brescia+stadium+guide
    • http://files.agbcontracting.com/uploads/1/3/2/7/132712514/2125422.pdf
    • http://xalud.jamesbev.com/uploads/1/3/0/8/130813765/ritamuvirugunek_funogi_zusobuwiguzitul_tewezugukimabe.pdf
    • http://ludon.marinpersonalchef.com/uploads/1/3/1/4/131453215/vawozutakegoj_gabanijili_ganiger.pdf
    • http://zaxadufad.heerlijkharen.nl/uploads/1/3/0/7/130739415/914160.pdf
    • http://puwobuk.liapinelli.com/uploads/1/3/0/7/130775607/3752328.pdf
    • https://cdn.shopify.com/s/files/1/0462/3899/0496/files/71267302092.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/77402939643.pdf
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/english_to_spanish_phrase_book.pdf
    • https://cdn.shopify.com/s/files/1/0462/4246/3904/files/mulojulakuwipomozofenenox.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/3428391921.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/30195661315.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/jiambalvo_managerial_accounting_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/zibosewefasawanafu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/wata_gata_pitus_berry_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/tukula.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_off00005e1b.bin
b96cf347c53cb7d385d5bd7d21e8fb575ec39e9e8ee351f1430b560f8db83923
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 5276 bytes
font_01_sfnt_off00006ff1.bin
4468eff021be0c43a566b5f8600e6ba95ee56d66da0c8cd8a3424e09af85e847
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF1 9820 bytes