Malicious PDF — malware analysis report

Static analysis result for SHA-256 0791e0313ad021d5…

MALICIOUS

PDF

44.1 KB Created: 2020-09-01 16:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77c7987795ddd0ec2095b5f21b0ce98e SHA-1: f6f022c73f02896812bc23f5d588ea16e8a7ce04 SHA-256: 0791e0313ad021d54ad2dfebd98789045f1af982f280b375c9986e57b982e343
162 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting an SEO link farm or content distribution network for malicious links. One critical finding is a link to a known malicious redirector at 'ttraff.com', indicating a probable phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=asthma+guidelines+pediatrics+2017
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/viguzif.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/weletuxejip.pdf
    • https://cdn.shopify.com/s/files/1/0461/0732/8675/files/51006239005.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/libros_de_arquitectura_renacentista.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5355/files/90895799715.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d59e2aafec54b5bbc9471395247519a.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_dab45ffaeac04a4fa4cff0b28342bd4e.pdf
    • https://static.usrfiles.com/ugd/289c5e_2fd00460ab5647c4b37641949a813fd9.pdf
    • https://static.usrfiles.com/ugd/a298ce_e665dd6055a540b799037bda788d47c1.pdf
    • https://static.usrfiles.com/ugd/ce14f3_abaaf92dad084aedaa7767e2cc2e4d48.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/faparuma.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/production_de_l_acide_sulfurique.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1879/files/benznidazol_mecanismo_de_accion.pdf
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/apache_lucene_search.pdf
    • https://static.usrfiles.com/ugd/0779a3_13f28ea2c3e243b0b0e7d73ebe9fdb8d.pdf
    • https://static.usrfiles.com/ugd/c3548c_72d7c3945af54d128fa5b496f98ddf1c.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_off00006cc6.bin
2e556ed65bc8c72f84ddec8bfe4bc177f999a40e18333d0765a3979ccb3466e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC6 5884 bytes
font_01_sfnt_off000080ae.bin
1f94a94c55e933d5e408b41b022846eb5026cc260e5cc6dfa4863167b7e02ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80AE 10140 bytes

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