Malicious PDF — malware analysis report

Static analysis result for SHA-256 507bd483df093225…

MALICIOUS

PDF

73.9 KB Created: 2020-08-31 08:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ebaaf3cae6b69b52fb7637b4beb0565 SHA-1: ed274fd1224213f8239169556de7a0768ca8ed25 SHA-256: 507bd483df09322513c6b6605fdc5658692ee0750f675fd62f23a36045ca2255
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, 20 of which point to PDF files hosted on Shopify. One of these links directs to a known malicious redirector, ttraff.com. This suggests a link farm or SEO poisoning attack designed to lure users to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=lenguaje+visual+fotografia
    • https://cdn.shopify.com/s/files/1/0458/1258/0518/files/essentials_of_utilization_focused_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/jizum.pdf
    • https://cdn.shopify.com/s/files/1/0462/3479/6181/files/kovawepeza.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/formula_para_muestra_finita.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/92340377121.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/81067603619.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/76813292023.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/bhagavad_gita_chapter_1_slokas_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/98760662948.pdf
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/76399805227.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bda5.bin
86a8573ae326fa6eb4c0a52c9213dfeb5210f388e321e6431445aae335616aed
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA5 4892 bytes
font_01_sfnt_off0000ce6f.bin
4e82cf4f7ed4a05ad764b3b92685361cbf28c4630416a5ce2fc2df0a91878424
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6F 11656 bytes
font_02_sfnt_off0000f47d.bin
af5ba0225d748858eea57f4e802053d7ea08636042482a6d9c18148026dce33a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 16580 bytes
font_03_sfnt_off00010a8e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 4324 bytes