Malicious PDF — malware analysis report

Static analysis result for SHA-256 622d707ac5808c89…

MALICIOUS

PDF

37.8 KB Created: 2020-08-24 12:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c7b77bad3f19b9c9739c9257627dcf9 SHA-1: b0ac844830a0535db037b23e520bdab0f1e31e3c SHA-256: 622d707ac5808c896008b657300331e9b854d9394c9b1e846d92b0e9ed3bec12
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised with a keyword related to 'haunted house pictures'. The document also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence indicate a malicious intent to redirect the user to harmful content.

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.ru/pify?keyword=haunted+house+pictures
    • http://files.thediplip.com/uploads/1/3/0/7/130739343/jigobafise-vuretedu.pdf
    • http://files.allysonboate.com/uploads/1/3/0/9/130969740/zejewetile_xofibabawatap_lunidolem.pdf
    • http://files.lovelearnshare.com/uploads/1/3/0/7/130775942/4790972.pdf
    • http://movubim.creativeedgestudio.co.nz/uploads/1/3/0/9/130969130/pifobigazofivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/bafg_bayern_formblatt_ausdrucken.pdf
    • https://cdn.shopify.com/s/files/1/0438/0426/2561/files/kixodifikasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/57005704975.pdf
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/xozomamowo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3694/9152/files/5787050264.pdf
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/9080649011.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/wubikagokapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/shopping_site_website_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5997/files/woronutisoruluwumiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/bwv_543.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a5a.bin
e40db72d7ddf308e54eb27826764aacaef99562b3e1f8ae7caec525f8d3e29c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5A 4972 bytes
font_01_sfnt_off00005b2a.bin
42cb0042f1c4966ab828981bcacb37b7518ba430faa11a8eae87e3e7d9aa08fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2A 9712 bytes
font_02_sfnt_off00007c5b.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 4324 bytes

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