Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6089e9f16bf773…

MALICIOUS

PDF

47.2 KB Created: 2020-08-31 05:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d89a3a19ab74ed5f4ebc68887736b0b5 SHA-1: 86782b0b29258f5a538ac7af95e9ff22ba8d6730 SHA-256: cd6089e9f16bf773c2697c03e77fec3b7f817e244bf083d18e42e2e431c26a6e
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, 'https://ttraff.ru/wix?keyword=alice+munro+dear+life', points to known malicious redirector infrastructure. The document also features a link farm hosted on cdn.shopify.com, suggesting an attempt to artificially inflate search engine rankings or distribute malicious content through SEO manipulation.

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.ru/wix?keyword=alice+munro+dear+life
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/duzurobolij.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/kokosularizapizagatepeso.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2253/files/bindiya_chamke_choodi_khanke_dance_performance.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/88891047777.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/88624927552.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/nanismo_gigantismo_e_acromegalia.pdf
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/tuwiduvupufotemedobexun.pdf
    • https://static.usrfiles.com/ugd/b8c837_d34944ebd7a840a1aca28e821e20bf63.pdf
    • https://static.usrfiles.com/ugd/accd1f_3298d6efb4db41c594e3ddb298864413.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5dc59ba1eb84f729cf8d39e0db1e8c6.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/37760299719.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/fikinililuvasubodiwiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/xatusokomipegepuguwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/centrifugal_force_formula.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007030.bin
fe778a7a1565d025646abbd4e7de520bc80a5a5a9b164b21bf1fb489e9dbf7d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7030 4780 bytes
font_01_sfnt_off0000803d.bin
0e77a4a71e98dd5e4340e2e658612c87755f11ebd5e2fd995b32c9f35abf4098
pdf-font-stream PDF embedded font (sfnt) at offset 0x803D 9964 bytes
font_02_sfnt_off0000a24e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA24E 4324 bytes