Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2651295c3f40fdf…

MALICIOUS

PDF

36.5 KB Created: 2020-08-31 01:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc5d88d989c3b271cf3d45f0f75458ab SHA-1: 04229abc5aba70e94c6f27ce3ead9769aaee17e8 SHA-256: a2651295c3f40fdfb13e031056ae21c9d5365ea55557ac30ce49e3cd10342785
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external resources, many hosted on Shopify. The primary malicious URL identified is ttraff.com, which is likely used for redirection. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs.

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=capabilities+based+assessment
    • https://cdn.shopify.com/s/files/1/0429/5704/5916/files/sazejojipu.pdf
    • https://cdn.shopify.com/s/files/1/0465/5310/4542/files/jonoxegekukimi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/putagilezemibopa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/55633305033.pdf
    • https://cdn.shopify.com/s/files/1/0431/3491/0618/files/bupuzopulumelibatenula.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdf
    • https://cdn.shopify.com/s/files/1/0460/1924/8295/files/mr_sandman_the_chordettes_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/preveno_do_cancer_de_boca.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/mogedikopovinadekap.pdf
    • https://static.usrfiles.com/ugd/39cb9d_323cbcc57afe4ba19ccea23eb107714e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd33b18b82f54cf28e2726869c1ee28e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c4e3d1d74f947e1ae4d67666191a89f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3011a4f3a1d545b59a2c0ab3f6444fef.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cf2c20355124479abdb0d95ffc0040b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53635556436.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/46951297391.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/61744429554.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/zusomala.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_off00005180.bin
b7d6d2fdb29b0fd32bbd7458ebe5830af2e272bf32c70fb98115be18184395d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5180 5056 bytes
font_01_sfnt_off0000628f.bin
bdddcd126aa020724a2d6c35b6ab50e3181b9808c5c65b940fb7467f5bbe0de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 10508 bytes

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