Malicious PDF — malware analysis report

Static analysis result for SHA-256 24347e770c6f5ee3…

MALICIOUS

PDF

44.2 KB Created: 2020-08-13 23:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcb8c060ffa33119cb432f4f4a17303d SHA-1: d220bdf14049da7c5be3dd25dd154b9037b53de4 SHA-256: 24347e770c6f5ee3f3fd570ae0c4534d405c9bd159a682c742972c206d9c8a52
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=offline+shooting+games+android', which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains this URL, suggesting it is the intended lure.

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=offline+shooting+games+android
    • http://files.my-minis.com/uploads/1/3/0/7/130739107/ea5e19a353286fd.pdf
    • http://files.alemuwoldemichael.org/uploads/1/3/2/6/132683000/safefogisalo.pdf
    • http://files.aquaelementeliquid.com/uploads/1/3/1/6/131637147/munivezexevot.pdf
    • http://files.jeremy-proulx.com/uploads/1/3/0/7/130775197/b79ec8863a42.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/15309462119.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/71439286254.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/vumugivibubiroxibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/polaroid_cube_plus_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0438/7799/0568/files/time_complexity_of_algorithms_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/21996101547.pdf
    • https://cdn.shopify.com/s/files/1/0434/7448/5401/files/caat_audit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/35934513557.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/ring_of_chest_vampirism.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/90726495542.pdf
    • https://cdn.shopify.com/s/files/1/0450/3588/0598/files/42471642099.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_off00006e8f.bin
63ce292c00609f774680fc1512b9f8cb1812de28bd253f82345ab2bb24a0499b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 5348 bytes
font_01_sfnt_off0000808d.bin
3ea7600079f084e911c85cfb7b375299f19913b90ab2a1e2b2d7cae51262483e
pdf-font-stream PDF embedded font (sfnt) at offset 0x808D 10212 bytes