Malicious PDF — malware analysis report

Static analysis result for SHA-256 287872d3bf1c25fb…

MALICIOUS

PDF

40.3 KB Created: 2020-08-18 15:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1be3625785678cb362c8564979618bf1 SHA-1: cc639bbf54310ba57f461f85eabeb99f6ee7d18a SHA-256: 287872d3bf1c25fbfe5a9d2e258e9d24345520df050a4f8fc1ed854132695158
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=html+css+template+github'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to distribute content or traffic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains embedded URLs that are likely part of the lure.

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=html+css+template+github
    • http://files.quietcovetravel.net/uploads/1/3/0/7/130740438/100778.pdf
    • http://files.lm2go.com/uploads/1/3/1/3/131398333/gadizilufokuvorut.pdf
    • http://xoxoja.greaterfortpolkarearealtors.com/uploads/1/3/1/1/131163507/7090005.pdf
    • http://files.messyhairmountain.com/uploads/1/3/0/7/130739712/bowalorogegeb.pdf
    • http://totuw.thepuzzleleaguedance.com/uploads/1/3/1/1/131164250/909d86e23d558.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/geospatial_analysis_a_comprehensive_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/raxalavemadedevizew.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/janek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/motorcycle_deed_of_sale_template_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/fejaluzulimojomatezimolap.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/kiboxinazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/xoroberem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/74091770316.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/bakery_business_model.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0077/files/adblock_extension_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/vogakowewizipab.pdf
    • https://cdn.shopify.com/s/files/1/0451/0951/0297/files/quran_word_meaning_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0447/9025/1681/files/attendance_allowance_sample_form.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_off00006063.bin
fdac8842936a855d6c91337aae531901e54375298cad26a549f7a4e2b11900d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6063 5352 bytes
font_01_sfnt_off0000726b.bin
b4ddd655ee07dd6bd56b6451ea1ca26639af3ecb9e4ab93902f24cfc8d52ef97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 9936 bytes

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