Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1e6ddcc8416779…

MALICIOUS

PDF

48.4 KB Created: 2020-08-06 20:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd0b6dc2efa72ea844ff6404aa4c8f20 SHA-1: 82d681779e548bef30f0f436c6f5a962a47ab8cd SHA-256: 3d1e6ddcc8416779330231bb6ba82ebbb64e021f52a723f813cf47e59b0b9003
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=operational+amplifier+and+linear+integrated+circuits+by+ramakant+pdf'. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=operational+amplifier+and+linear+integrated+circuits+by+ramakant+pdf
    • http://files.statementculture.com/uploads/1/3/1/1/131164273/woxumevex_jorekosilif.pdf
    • http://files.tangerinetales.com/uploads/1/3/2/7/132741110/2734373.pdf
    • http://files.williamzin.com/uploads/1/3/1/4/131483343/87815f7.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/goxovaxilivizogezage.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/48345468138.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/87664991858.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/algebra_2_glencoe_mcgraw_hill_teacher_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/vocabulary_workshop_level_a.pdf
    • https://cdn.shopify.com/s/files/1/0432/0120/0289/files/sigewinekot.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/61979604602.pdf
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/dapaxaselakeludobewavaka.pdf
    • https://cdn.shopify.com/s/files/1/0447/3962/5111/files/channels_of_communication_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/should_or_ought_to_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/is_multiboxing_allowed_in_wow.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/mmrc_dyspnea_scale.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_off0000655c.bin
4e3b8cebe2f7d474f6d3c9e9ea067e2ae4401230b4952b7e66c796b51ecf9b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655C 5808 bytes
font_01_sfnt_off0000790a.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 2116 bytes
font_02_sfnt_off000082d6.bin
4bc097589a9d4dec3573f0644ab51d9972178e4b1de921474dfc4b6fc35ae40f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D6 15188 bytes

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