Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb6015a25ba060a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-16 23:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1127d6fedacb9bd7df66f9f4b2454833 SHA-1: 2c82e6c61e150afa17ec860458e45cf54c112694 SHA-256: 5cb6015a25ba060a80204c5b0c462278c6f227922628ab81f806724383e91914
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to 'label template in word 2007' and includes the malicious URL. The ML classifier also strongly indicated maliciousness.

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=label+template+in+word+2007
    • http://files.fashionshowhousephotographer.com/uploads/1/3/1/3/131398195/takapasukinotu_bepigavivux.pdf
    • http://xujuzuvop.minursespac.com/uploads/1/3/0/8/130874388/8486507.pdf
    • http://files.thecheshireclean.co.uk/uploads/1/3/1/3/131383802/foloxewupuwagi_zeluf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6522/1015/files/fupabowugagaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/vabiwiwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/lixudivobizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/2042413187.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3622/files/bututewof.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/19237708039.pdf
    • https://cdn.shopify.com/s/files/1/0434/5033/5384/files/68878826693.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/ielts_speaking_questions_and_answers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9199/files/voluzoleporutezesef.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/xifimedubinabaruzaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/podududugarelebizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/43474896824.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006532.bin
d82a823f5ea15b5a3c1a127919b53c9da3a7bc8534d66c6aa8144b7ad3195524
pdf-font-stream PDF embedded font (sfnt) at offset 0x6532 5452 bytes
font_01_sfnt_off000077bb.bin
184881c60b4af6bc956f373819e54e925571cde94d3773ed0d7c49b2dbdceb4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 9812 bytes