Malicious PDF — malware analysis report

Static analysis result for SHA-256 076a4bec63278ff1…

MALICIOUS

PDF

43.3 KB Created: 2020-08-10 14:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be79bb72ef4dffbbb69bda7e87bb4b8 SHA-1: 2d5defa9bd45065658a35ef06bea870750e130a3 SHA-256: 076a4bec63278ff18f4a021e67627447a8e4da873e9379a759746f4ea7b62c56
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.ru/pify?keyword=walmart+leadership+assessment+test+answers+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to malicious infrastructure under the guise of providing assessment answers. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or scam attempt.

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=walmart+leadership+assessment+test+answers+pdf
    • http://files.firstpresnb.org/uploads/1/3/1/4/131438202/butebamovuw_nelaponuvepimam_jalapu_rasarovurikej.pdf
    • http://files.cecvehicleleasing.com/uploads/1/3/1/4/131438397/futera.pdf
    • http://files.baytagoodah.com/uploads/1/3/2/7/132741486/jobaber-zifev-gomanif.pdf
    • http://files.destijlkennels.com/uploads/1/3/2/3/132303245/kibomapatixow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/26864665549.pdf
    • https://cdn.shopify.com/s/files/1/0432/1918/9915/files/astaghfirullah_dua_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/20709144391.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/bepuruzeremas.pdf
    • https://cdn.shopify.com/s/files/1/0428/5104/1447/files/figuwelofoxufin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/bopuzebesu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/62022326211.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/vewawubirilozozisen.pdf
    • https://cdn.shopify.com/s/files/1/0451/7101/5829/files/willingness_to_pay_for_health_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8362/files/77171166803.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73792904944.pdf
    • https://cdn.shopify.com/s/files/1/0430/4705/9607/files/wuwavexumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/gezijomipeduvibubonefujew.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_off00006b2c.bin
33d53f4566d1a2db4d870ea1b65463c59b6a766dffa8e2deea3549fa620ed8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2C 5388 bytes
font_01_sfnt_off00007d71.bin
3314b72c25c6bf97f9038d5a2202825d0ee1a034812cdd65da77fa03d703da32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D71 10040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.