Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbec63179dd4991…

MALICIOUS

PDF

49.2 KB Created: 2020-08-12 12:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32424e086dc349981cfcfc1f7d0464be SHA-1: f5ddcc565d25e9790ab754cc30dc06067435fe86 SHA-256: 4fbec63179dd4991299a28036661fd67f5375f46baeb2599ceac3861857bfc17
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, a common tactic for SEO poisoning and phishing campaigns. One of these links, 'https://ttraff.cc/pify?keyword=bloomberg+energy+outlook+pdf', redirects to known malicious infrastructure, indicating a high likelihood of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm and malicious redirector are sufficient indicators.

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=bloomberg+energy+outlook+pdf
    • http://files.finalfinishdetailing.com/uploads/1/3/2/7/132710655/levin_linebedanelu_vidaki_vukadidi.pdf
    • http://files.buildvaluehere.com/uploads/1/3/0/7/130775958/7301864.pdf
    • http://files.metlifelostpensions.com/uploads/1/3/0/8/130813582/9f4fa1b.pdf
    • http://daguwuja.fijideaf.net/uploads/1/3/0/8/130814526/xagevuwarar-bofoberigotofux.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/96710121741.pdf
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/95869997086.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/dofik.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/present_perfect_just_already_yet_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/88782801377.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/adobe_premiere_pro_cc_2020_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zovoxumaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/godabepikemuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xirapekewovefosisukepeja.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/autoformation_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/fuxeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/outer_worlds_speedrun.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/latex_document_class.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/37595239959.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_off00007377.bin
8eeec6eaf2ed37752b80b23f951c01edc58f7a8e528159a9ffdcf22938a6a9e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7377 5328 bytes
font_01_sfnt_off0000858d.bin
0df824989373ce061c54def1415eb57a37e263ebffd6cf82ecb54112e45802d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858D 16180 bytes

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