Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0149742c12877ff…

MALICIOUS

PDF

52.7 KB Created: 2020-08-19 16:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f775a47fe67ad172d9a0df567ca351 SHA-1: 37896629159ec5f982ff0df592af20d456cbecdf SHA-256: b0149742c12877ff78b75aa27b24b97b9eb7eaac218c2e16d37ae111c7955daf
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to 'https://ttraff.cc/pify?keyword=affinities+of+prototheria+and+metatheria+pdf', indicating a phishing or malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and multiple embedded URLs, further supporting the malicious intent.

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=affinities+of+prototheria+and+metatheria+pdf
    • http://files.livealifeofservice.org/uploads/1/3/1/0/131071240/d4c5b2d96e1cfb7.pdf
    • http://xubifes.aleksandrvoinov.com/uploads/1/3/1/4/131407089/3395ac9f474.pdf
    • http://files.rewoca.org/uploads/1/3/0/7/130776607/jawonamelefo_xowavozuped.pdf
    • http://files.trackingclubofma.com/uploads/1/3/0/7/130738993/5062284.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/25177313152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9065/7951/files/fupugerudenepisativumijoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8244/files/vipita.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/zisokoxolako.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/angularjs_export_excel.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/wobetefawadidinemozaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0491/9971/files/college_panda_writing_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/libros_para_aprender_italiano_desde_cero.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/mugozodedazuwanuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/34281002695.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/tivutalaxofurumofame.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/83534383755.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_off0000841d.bin
d0280f1a7912352de9fe8fb5fe63d74be68d848d2fac2e6f8a35e303ef636bda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841D 5028 bytes
font_01_sfnt_off000094ff.bin
af63cc9baf3cc03e9a01a933166b026f76504d7f64696b9cd817371dc85367fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FF 10032 bytes
font_02_sfnt_off0000b75f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB75F 4324 bytes

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