Malicious PDF — malware analysis report

Static analysis result for SHA-256 7beb9de3b9fce7b3…

MALICIOUS

PDF

53.4 KB Created: 2020-09-06 06:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03cec16e42c6580ab87d7086a2575f25 SHA-1: 62b7133cdf8c713edd03321ec3ff32c2d179fcc9 SHA-256: 7beb9de3b9fce7b3e15f6b8db5d2ed2824cc26fff9e425f29e3ba1b6960f1518
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.ru/pify?keyword=bubble+graph+google+sheets', is flagged as a known malicious redirector. The document's content appears to be obfuscated or corrupted, but the presence of these links strongly suggests an attempt to manipulate search engine rankings or redirect users to malicious 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.ru/pify?keyword=bubble+graph+google+sheets
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3e9e83_377674baf49b4ad5bbd8c27be93cb7f1.pdf
    • https://static.usrfiles.com/ugd/865d50_ce1312e819404f56817a3c4473ce39d6.pdf
    • https://static.usrfiles.com/ugd/0dd040_a1f33e2c29974e79b887b461602a089e.pdf
    • https://static.usrfiles.com/ugd/98857b_a7d7193de76b44e489ed28b17186d6e1.pdf
    • https://static.usrfiles.com/ugd/0df15e_19785956125947bda107a3bcdc299e15.pdf
    • https://static.usrfiles.com/ugd/7198c1_ab401dd3d17546fda36c47c9ae374b70.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/4913723376.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/basipelatibizubiwesel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/zepekugusupegonimanav.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4869/files/wotatujufopilojomef.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/judef.pdf
    • https://cdn.shopify.com/s/files/1/0434/8900/1638/files/sopizumud.pdf
    • https://cdn.shopify.com/s/files/1/0460/7141/4948/files/10th_marksheet_loan_apply_online.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_off0000843f.bin
9df575244e4588b8d6048271e7757347f857137e8923b6b8a4dfc01d47b12cb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x843F 5272 bytes
font_01_sfnt_off00009622.bin
53a079f1ae176f9aad33b0a67552bae0bc4a2c30653e036701beeaa8d34bd243
pdf-font-stream PDF embedded font (sfnt) at offset 0x9622 15576 bytes