Malicious PDF — malware analysis report

Static analysis result for SHA-256 0737c8bdbfa61c6f…

MALICIOUS

PDF

38.2 KB Created: 2020-08-25 05:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b440de09e65663991f550263a22bc74d SHA-1: f8be7b6f6e202aca55f1ab55ce3a0ab8c2bf03a2 SHA-256: 0737c8bdbfa61c6fbcf8c5c28c5428a4dabb11b28134bee08278cbfb08b1a932
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.cc', suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to a 'majesty demo game free' and the malicious URL, indicating a lure to entice users to click. The presence of many external PDF links also points to a link farm or SEO poisoning tactic.

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=majesty+demo+game+free
    • http://files.templetonffa.org/uploads/1/3/0/7/130775565/kotuwitig_walox_mijikiterixabit_popikibijomew.pdf
    • http://fimufew.through-the-wardrobe.com/uploads/1/3/1/4/131452861/4767092.pdf
    • http://bukuruw.desotoyou.com/uploads/1/3/2/6/132681337/ca21c6.pdf
    • http://lejela.100womenwhocarenorthsuburbanchicago.com/uploads/1/3/0/9/130969368/1348994.pdf
    • http://files.bitsandbobsmv.com/uploads/1/3/0/9/130969577/tawovefuzitelilekun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8329/2060/files/2834096436.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/architectural_design_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/1586/4473/files/ring_of_blades_ds2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/jekuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5868/files/vasokurufaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/jikolulow.pdf
    • https://cdn.shopify.com/s/files/1/0432/3554/1151/files/24107496221.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/goverukewe.pdf
    • https://cdn.shopify.com/s/files/1/0452/0479/9639/files/vision_ias_budget_2020_20_summary_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/kigivek.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/tosedinazetujagosu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/zopetitoda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005725.bin
12410ecb70233544e6326fd61ccba7b60faa5689af0df83c80c1dbe171c1c3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5725 5376 bytes
font_01_sfnt_off00006974.bin
f2c04a199e8787324f30925b0491e97d9106749d4eae106e4df3960f82ec5984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6974 10128 bytes

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