Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcb670f52e5e4a8…

MALICIOUS

PDF

49.7 KB Created: 2020-08-31 03:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d26572d3ab8090ac199dfe45fbae1f9 SHA-1: 6e5212f86c42a82dc279a7b64ae9865dabb4189a SHA-256: 6bcb670f52e5e4a84bb43d9a185281750085c0b4cf060719ba3ee02f1aa6ad34
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including a benign-looking Shopify link. The presence of a 'download button' lure further suggests a malicious intent to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=p2p+cam+viewer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/animation_in_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/atrovent_davis.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/kugexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1811/5480/files/79877613296.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/tixewogezeparegoriv.pdf
    • https://cdn.shopify.com/s/files/1/0462/7827/9317/files/bestwap_in_2019_movie.pdf
    • https://cdn.shopify.com/s/files/1/0448/0811/0242/files/amlodipine_norvasc_davis_drug_guide.pdf
    • https://static.usrfiles.com/ugd/d4da64_22ed8ac1ba874a19b38a695f88ae9112.pdf
    • https://static.usrfiles.com/ugd/b9801a_527dd94660974ea7a3520abd5c621279.pdf
    • https://static.usrfiles.com/ugd/6116da_b0abc88ca5f64a689b8bc40c2256914d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d76afc95570843bbb83e292015836584.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_off00007f63.bin
0219ab11eae75924333536c04cc30c994f67586a2d2a02a3ccad78de192e3413
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F63 5156 bytes
font_01_sfnt_off000090e6.bin
ea715c76dd074d54137749981ee2fb3b254b7cfeab53a06d043fd8bc383d1809
pdf-font-stream PDF embedded font (sfnt) at offset 0x90E6 13232 bytes