Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec67847fc096c139…

MALICIOUS

PDF

55.1 KB Created: 2020-07-27 17:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3684565932649c3ee435c18ae31d3a4 SHA-1: 692f1cc172808f8774593f6335022a0f893998e8 SHA-256: ec67847fc096c1395563098b5d65fb3e52b5feddc32f2f276e04f341ebae9edb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=music+cover+design+template+psd'. Additionally, it exhibits a PDF link farm behavior with numerous links, including one to 'https://cdn.shopify.com/s/files/1/0435/7410/0127/files/36357134656.pdf'. The ML classifier strongly indicates maliciousness. The document body, though heavily corrupted, contains fragments suggesting a lure related to design templates.

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=music+cover+design+template+psd
    • http://files.thesourcemassage.com/uploads/1/3/1/4/131438843/e2aa476d683d.pdf
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdf
    • http://files.cyrphotography.com/uploads/1/3/0/9/130969158/3951034.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/36357134656.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/dikolofufofelotar.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/94311557626.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0359/files/fuzalamozilowajotalovedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/68986963636.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59577082877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/jawigiruriw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1894/4665/files/87405373579.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/taripukape.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/95351702701.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/59830768415.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorabo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/60851499258.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/wufinizomogemavavubamowij.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_off00009001.bin
9917a9eec2c2105cff8fbb489b057b9de443de66b082e9120587f4238b8155f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9001 5340 bytes
font_01_sfnt_off0000a219.bin
39e99ca9b5f63cb98df82ab940cc8452cde6c96dd2d162c808ad9ff16a8faa10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA219 14380 bytes

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