Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8ad5e7006fb17a…

MALICIOUS

PDF

40.0 KB Created: 2020-08-25 02:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e46c078b141feda3a2ec5b145d0e5eee SHA-1: fa8c02ded193efddfe28422497df372a130b6403 SHA-256: 9c8ad5e7006fb17a31306757bbe490cbf66ff78ff8aad6d547bb2a6bcf04859a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=blackboard+collaborate+launcher-+win'. This indicates the document is designed to trick users into clicking a link that likely leads to a malicious download or further compromise. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive 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/pify?keyword=blackboard+collaborate+launcher-+win
    • http://files.mrsavans.com/uploads/1/3/0/7/130775001/3599858.pdf
    • http://files.trailbaseball.com/uploads/1/3/1/3/131384113/9803072.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/mifeligakojure.pdf
    • https://cdn.shopify.com/s/files/1/0444/8944/1447/files/aasimar_race_5e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/estrous_cycle_in_mice.pdf
    • https://cdn.shopify.com/s/files/1/0436/7882/6661/files/los_numeros_romanos_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/26966991717.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/alif_episode_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/36965502525.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/my_talking_angela_2019_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/22460990330.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/31945916214.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/99246758617.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1303/files/ultrasound_guided_aspiration_cpt_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2284/files/concerning_hobbits_piano.pdf
    • https://cdn.shopify.com/s/files/1/0439/0685/9176/files/93624404510.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_off00005f2f.bin
09e8e485e8998ccf1ef264f3d7baae32a61645ebecac3ed1f50036f86b7c8f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 5228 bytes
font_01_sfnt_off000070fc.bin
3efcea1503cebcc6517c1a87de1940cb801c657ecc41d7612f78c54f4dd4aeee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 9880 bytes

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