Malicious PDF — malware analysis report

Static analysis result for SHA-256 649659cb7f3467ae…

MALICIOUS

PDF

47.7 KB Created: 2020-08-19 18:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ecf8a581a08c2962cac943d0e4ef165 SHA-1: b23e20a13a2d4d7b18457f2d2adc04979ba79236 SHA-256: 649659cb7f3467aee980cbcb3507ebd908ff5636994f4e0daadeb14fc79cb650
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or scam campaign.

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.com/pify?keyword=christmas+tree+drawing+pic
    • http://zigava.deltapsichapter.com/uploads/1/3/2/7/132712358/54b3b0d1667.pdf
    • http://vujiweta.nextlevelbizgrowth.com/uploads/1/3/1/4/131411688/faaadcbe.pdf
    • http://files.morganelwell.net/uploads/1/3/0/7/130776639/ropop_xitemaw.pdf
    • http://files.memorymapformusic.org/uploads/1/3/1/3/131384635/6747749.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9177/7949/files/rajovedurevosafulubedanam.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/nurababomebibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3899/files/somipokatexifevenumerabod.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/25368272588.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/74325410651.pdf
    • https://cdn.shopify.com/s/files/1/0456/8422/8255/files/4372614080.pdf
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/powerpoint_background_free_2019.pdf
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/exercices_corriges_sur_les_bascules_et_compteurs.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/bulletin_of_engineering_geology_and_the_environment.pdf
    • https://cdn.shopify.com/s/files/1/0450/6225/8851/files/banting_red_list_2020.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ad.bin
dd353fc2019b89d48732a3c9544360d258c5d8469883db0880ee4b8945f21d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AD 5248 bytes
font_01_sfnt_off00007a68.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A68 1800 bytes
font_02_sfnt_off000082f5.bin
c466c3df46d4541f186cb17f35c227fd38380464cc58a5e15ce4477263d53aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 9580 bytes
font_03_sfnt_off0000a388.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA388 4324 bytes

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