Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc9a4a332e21218…

MALICIOUS

PDF

57.3 KB Created: 2020-08-31 16:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 174711ff80d589796afd9f87f99d4789 SHA-1: 1619b369dd3b454fb898060e8bfb492b73535b61 SHA-256: fcc9a4a332e21218bfd70665dffc80899e6f185adb1053c8747444a5736f6330
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as an employment agreement template. The link leads to 'ttraff.cc', which is known malicious infrastructure. The ML classifier strongly indicates maliciousness. The document body contains the malicious URL, suggesting a social engineering lure to trick users into clicking the link.

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/wix?keyword=employment+agency+agreement+template+free
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/accord_aix_les_bains_maroc_france.pdf
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/79635173592.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/bolusaxogivisorozenazodux.pdf
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/bach_bwv_106.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/septoplastia_e_turbinectomia.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/63121036097.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/74637187128.pdf
    • https://cdn.shopify.com/s/files/1/0447/9896/7974/files/national_antibiotic_guidelines_2017_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/25026897949.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/36281835048.pdf
    • https://static.usrfiles.com/ugd/33ab24_d54ab496f06841ae811ed47a03d1a9b8.pdf
    • https://static.usrfiles.com/ugd/4b68be_4567315181594f068b7d698c279e629c.pdf
    • https://static.usrfiles.com/ugd/b8c837_348a381b90e04564b8edfbc84f6041ee.pdf
    • https://static.usrfiles.com/ugd/784815_af153bbf78004085aee3bdd0cef89174.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_off0000a3aa.bin
69941b19b928d99e71f03f16d57de816a0f560d338fe9f1f751e991cb974b09b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AA 5216 bytes
font_01_sfnt_off0000b568.bin
301c244fafbc7a7f4af779cefc4e4d3f0b7c55f9bb20e240143bdd9dce063b38
pdf-font-stream PDF embedded font (sfnt) at offset 0xB568 10044 bytes