Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c7cec57a7690a6…

MALICIOUS

PDF

42.5 KB Created: 2020-08-16 11:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37feb2bdd700b68bc102fa1a3c546d04 SHA-1: dd757c7761bc4238a856f66b7cb515c5079ea890 SHA-256: 54c7cec57a7690a68e33757eaa8bfd528fac4b0a634ada86fe13b6e79cba2454
152 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=lsm+700+quick+guide', which is flagged as a malicious redirector. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content.

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=lsm+700+quick+guide
    • http://files.isocandles.com/uploads/1/3/1/0/131070452/zubesudolafiroj.pdf
    • http://gawoter.nwtherapy.solutions/uploads/1/3/0/8/130813831/1b8038af27.pdf
    • http://kasogifix.spiritforyourlife.com/uploads/1/3/1/4/131482993/kelijeseloxezivi.pdf
    • http://files.palmdesertspacover.com/uploads/1/3/1/0/131070678/jorizaji.pdf
    • http://files.judytarnofsky.com/uploads/1/3/0/8/130873979/sezolowebo-wakifimajulugo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1935/1710/files/90689356802.pdf
    • https://cdn.shopify.com/s/files/1/0436/5477/4949/files/cambridge_slang_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/37221342256.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/talos_principle_b4_star.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0598/files/example_resume_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizazuvolabemonixodokij.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/52962831355.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_off000067de.bin
455bceb609568422a613ddbd08ba78f3b40101cafd5769a767245c2b51204982
pdf-font-stream PDF embedded font (sfnt) at offset 0x67DE 5272 bytes
font_01_sfnt_off000079c1.bin
99a4323cdd80df583247b5d09e54d84ac832ca720c1a03f5bef7ae8b10be027c
pdf-font-stream PDF embedded font (sfnt) at offset 0x79C1 10616 bytes