Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e50bc6033b45ce5…

MALICIOUS

PDF

48.9 KB Created: 2020-08-14 19:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2b4d2245693fc9ceb3d2f65fd139a29 SHA-1: 56ae116d17428a8955a4456a51d4335b58d6df82 SHA-256: 7e50bc6033b45ce5d4dd04d967cac522356db2f19cb68fee0f1b110ad5a504d3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is associated with malicious activity. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also hosts a link farm of other PDFs on Shopify, likely for SEO poisoning or to obscure the malicious redirector. The ML classifier strongly indicates 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=beauty+plus+premium+mod+apk
    • http://files.monroeyouthcommission.org/uploads/1/3/2/6/132682813/d0a50b2f20218a2.pdf
    • http://files.diagmal.eu/uploads/1/3/1/6/131637553/710b4b8a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/4522674296.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/19131525237.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8078/files/varibuserofex.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/alimentos_agroecologicos.pdf
    • https://cdn.shopify.com/s/files/1/0450/8601/5640/files/peter_drucker_biography.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/hypothyroidism_in_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/9452130955.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/dozonesoxesalira.pdf
    • https://cdn.shopify.com/s/files/1/0448/9589/5707/files/sosidaradifinudakove.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081f5.bin
916f4611d0eaf9d46eea064183a0b33cc8ef2d30bd17ee9269eb138185a87432
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F5 5320 bytes
font_01_sfnt_off000093fd.bin
810920567bac10972a65fe6f05a75842f7da7fb882526beca25038fd34366e7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x93FD 10140 bytes