Malicious PDF — malware analysis report

Static analysis result for SHA-256 e589234747f2ac60…

MALICIOUS

PDF

52.2 KB Created: 2020-08-19 14:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fff9ad5481e33a8a2bfde996217cf77 SHA-1: eac56901e1787bebb6347392da39813bf0600a28 SHA-256: e589234747f2ac609fff7908fcf5b894003bf3de24c9f26c081fececb1187988
152 Risk Score

Malware Insights

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

The PDF document is designed to appear as self-esteem worksheets but contains numerous links to external resources. One of these links, 'https://ttraff.cc/pify?keyword=how+to+boost+your+self+esteem+worksheets', is identified as a malicious redirector. The presence of a large number of PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=how+to+boost+your+self+esteem+worksheets
    • http://files.rhosarts.com/uploads/1/3/1/4/131438217/litutote.pdf
    • http://files.aldonelectric.com/uploads/1/3/0/8/130873961/vuwedunewun-vejimuveluvefiv-tukizexusomaki-paved.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0122/files/76950719184.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/lavafexidobilosesovojew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/27117656042.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/93058762215.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/banking_companies_nomination_rules_1985_bare_act.pdf
    • https://cdn.shopify.com/s/files/1/0430/4499/5221/files/69186786144.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/decimal_to_2_s_complement.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5877/files/dugulinovopitabumuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/46912740803.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/60043481589.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/furetisinudagej.pdf
    • https://cdn.shopify.com/s/files/1/0439/7731/0366/files/filmic_pro_manual_exposure.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/85935915315.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_off00008f31.bin
6692ad9ec78dd80a6c9855e958d4169160fc85a59c2d5ac84e0a342068906124
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F31 5156 bytes
font_01_sfnt_off0000a0a1.bin
5bc95b37229f5042b5a91ba84c577e2ac8cd09055c00944bd7e33d99ff2c6a32
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A1 10252 bytes