Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd4cc10486fd8a0…

MALICIOUS

PDF

48.9 KB Created: 2020-08-31 00:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0babecdd941dfea960989b315ccede9 SHA-1: 488caa83c3e2858998c5e91bf47d81c42f7d471d SHA-256: 9dd4cc10486fd8a023090db6504c85e1dd57cb634bdad7706fdf5de64a3cf564
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. Many other links point to Shopify-hosted PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector URL is the primary indicator of malicious intent.

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/wix?keyword=composicion+de+transformaciones+lineales
    • https://cdn.shopify.com/s/files/1/0437/4013/5575/files/mevafetagetejavoruradu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/computer_science_cv_template_latex.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/97112638093.pdf
    • https://cdn.shopify.com/s/files/1/0433/6677/6991/files/zuwosobonevadumuxonadifu.pdf
    • https://static.usrfiles.com/ugd/58a813_173565df35bd4bb981db8e10995d70c2.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/gowijivibofidifexemad.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/kozajibixiwupozabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/78283511426.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/54334309272.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/asap_rocky_long._live._asap.pdf
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/vovozote.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/pixinopimitapofaxabimo.pdf
    • https://cdn.shopify.com/s/files/1/0450/0835/5486/files/pevabivijilegogalezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/chisel_sharpening_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.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_off00007568.bin
c3360b0f1e038f7bedf83f51f89a93e4c537add216a3bf2a446cca516e8c7a05
pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 5208 bytes
font_01_sfnt_off000086fd.bin
c03cd5a5fe68d675fa2d6d9cf510f2cd502c7e0bdc55aa70f50ec82b9a76dfa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x86FD 15732 bytes