Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abf9f3958fcb586…

MALICIOUS

PDF

45.6 KB Created: 2020-08-29 17:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db1320d6081a57d88b44824cf5f73f1d SHA-1: de7552294e43e231495a77a172c5393814612337 SHA-256: 1abf9f3958fcb5866b3a78d54fb0af433dd99be3bbbeae74023e4ce50fd958e9
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a search result for 'Sistemas de informacion gerencial ejemplos'. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent appears to be redirection.

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/wix?keyword=sistemas+de+informacion+gerencial+ejemplos
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/miguwiwesixod.pdf
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/postal_gds_7th_pay_commission_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1879/files/piglet_in_bed_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32506959796.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/miracle_cream_shark_tank.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/mudoxojeneborerif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/fitetenusafizoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/jepenexoxemurulokakudulel.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/claim_evidence_warrant_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0447/5600/9111/files/base64_encode_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/goxixatepoxomaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/applied_optics_format.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_off00006fac.bin
c645150c7e4166b583b3edf3d784cbc652dac8b366017a4564d3344c64f2f9de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAC 5652 bytes
font_01_sfnt_off000082cd.bin
d0294fdb2d410892cdf76fd040e69c3d20d706160d26b016827b95325deb51a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 11336 bytes