Malicious PDF — malware analysis report

Static analysis result for SHA-256 810bb3de056d2883…

MALICIOUS

PDF

167.4 KB Created: 2020-08-08 13:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fd9d1d3a67d8e199bba4dcecf9ed641 SHA-1: fa5c14b9bc9ad47867602963b059025c80f952f0 SHA-256: 810bb3de056d2883a056342e4dc540b5ec9c8832d87605575249426b43edb677
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=alimentacion+saludable+para+ni%25C3%25B1os+geniales+pdf+gratis
    • http://puwax.graingercountytomatofestival.com/uploads/1/3/2/8/132814930/5126511.pdf
    • http://files.whytherat.com/uploads/1/3/2/7/132712198/xalinepopep_sodafu_salifiwisuk_zijikebexatupix.pdf
    • http://tevevula.slitefitnessapparel.com/uploads/1/3/1/3/131379965/6650651.pdf
    • http://files.kl-creation.fr/uploads/1/3/1/1/131164236/5808632.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/cantoral_catolico_con_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/zenith_zp506bb_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/juvoninugorileto.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/gamubixej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/comment_runir_deux_en_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8903/files/food_industry_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/12178623621.pdf
    • https://cdn.shopify.com/s/files/1/0432/0110/1985/files/69370277149.pdf
    • https://cdn.shopify.com/s/files/1/0428/2646/5436/files/23811894373.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/latikujosolurezi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1987/7024/files/70252681502.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000246a1.bin
92ebfd5330abadf1c6086280a2bc1e1dd610031b5fa1aa32eb91ed24c3cca15b
pdf-font-stream PDF embedded font (sfnt) at offset 0x246A1 5696 bytes
font_01_sfnt_off00025993.bin
e30d1e2756b08f8f63b992094fd52e2822a2903f7644164a3748e3b1fab560b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x25993 11396 bytes
font_02_sfnt_off00027e76.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x27E76 4324 bytes