Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c44cfda8f800e2c…

MALICIOUS

PDF

51.9 KB Created: 2020-08-23 22:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 284c6132c6129f3ae704bb5a37e9bb0e SHA-1: d099274bfe694f55dced64220661e0ce7ae5076b SHA-256: 9c44cfda8f800e2cb23ae34ca5fd5cf5885f3b2af87d1d0791588cab05dcfada
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, ttraff.cc, which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'fishing leve guide ff14'. The presence of numerous other links to shopify.com PDFs suggests a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the primary attack vector is the malicious redirector 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=fishing+leve+guide+ff14
    • http://files.aroundtheworldkitchen.com/uploads/1/3/1/0/131070561/tudig_fomikapax_zevajotixovunep.pdf
    • http://files.maruf.eu/uploads/1/3/0/8/130813526/4085458.pdf
    • http://files.heartnhands.org/uploads/1/3/1/6/131636655/6d69abb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/azitromicina_600_bula.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5716/files/les_accords_de_base_guitare.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/journey_only_the_young_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4966/files/52183026156.pdf
    • https://cdn.shopify.com/s/files/1/0433/5003/2549/files/tomisovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/air_cooler_project_report_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0392/files/conservation_of_energy_lab_challenge_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/47674233650.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1251/files/crummey_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/komonifibubulajavajina.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/93916998241.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/live_nettv_apk_for_android_tv_box.pdf
    • https://cdn.shopify.com/s/files/1/0439/7934/1982/files/mijufedodunisalunujixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/vewiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081cb.bin
38f986abfa28e22c9fc1351b0a1de9d7b751b8546e46609e3a67a44238bc724b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81CB 4712 bytes
font_01_sfnt_off000091cc.bin
4a8f2f69bc099b491238a8995955408a0859c50f42c04551404038327c5fc22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91CC 10052 bytes
font_02_sfnt_off0000b434.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB434 4324 bytes

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