Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18d29533baaf583…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 03:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddc3c5b7d57bdc38093904556e8e3a75 SHA-1: 24f0ff2c52ec1681a20de78c558a4184018d7aee SHA-256: c18d29533baaf58325d8c0bebf8902af52f856434de9abbf6c2d04fdde4130a8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=pixel+navbar+pro+apk+free'. This URL is presented within the document body, suggesting a lure to download potentially malicious software. The presence of numerous other PDF links, many hosted on Shopify, further indicates a link farm strategy to distribute the malicious payload. No scripts were extracted, but the primary intent appears to be redirecting the user to a malicious site.

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=pixel+navbar+pro+apk+free
    • http://files.artgymvt.com/uploads/1/3/1/3/131384777/wumon-zunir-wejepisi.pdf
    • http://files.firstnepalichurchoftucson.com/uploads/1/3/0/7/130739836/rorerurivero_jovij_kukego_dalatoxi.pdf
    • http://files.empowerptandwellness.com/uploads/1/3/0/8/130874169/nuvin_bakobalowelex.pdf
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/ghatna_chakra_in_english_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/gta_san_andreas_all_cheats_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0454/4200/7190/files/68495914251.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/48521754818.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/berkshire_encyclopedia_of_world_history_vol_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/niwufupijenakaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/pokemon_rom_for_nds4ios.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/georgia_residential_lease_agreement_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/49218057847.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_off00005cc6.bin
691874fd8f165223c6f5fc8f9b9163f1cf3492fd7953f133efff28a59ac0c985
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC6 5048 bytes
font_01_sfnt_off00006e03.bin
cac25a1c6d9a1e998418e12f37e56160c1b35c8b90627dc281523642123ba35b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E03 10616 bytes