Malicious PDF — malware analysis report

Static analysis result for SHA-256 0754c7c3ce8d05a5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 00:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d26f935c0c60940d3f24ef47ff66c2cf SHA-1: 061c3de73d228f56ecec21a6f26e40e571325555 SHA-256: 0754c7c3ce8d05a565430533f000d820b6cd5f307d91357dfedb2f44fb946806
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 shopify.com, but one critical link redirects to `ttraff.ru`, a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and a URL that appears to be part of the redirection chain, suggesting an attempt to lead the user to malicious content.

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=payback+3+android+game
    • http://moneluno.jackieschuknecht.com/uploads/1/3/1/1/131164312/salot_sedil_juxanukixiv_maravasobumij.pdf
    • http://files.arvinminer.com/uploads/1/3/0/7/130738841/mexavurogib.pdf
    • http://files.acsmonogramdesigns.com/uploads/1/3/1/4/131455543/balagoraj-zituwoj-wijakefeb-dodub.pdf
    • http://files.megumihiramoto.com/uploads/1/3/2/6/132682913/4c20a2ae2d8213c.pdf
    • http://files.claddaghcoffeecafe.com/uploads/1/3/0/9/130969002/gifodabux-malajoj-ketugularona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5699/6260/files/best_hip_hop_bass_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/nutezodujepirarapojizuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/algebra_1_quadratic_equations.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/94202759234.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/4559435438.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/59324288633.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/uptet_answer_key_2020_primary_level_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/xebudivusesa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0433/2974/9147/files/adding_fractions_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/xudopakobiduj.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_off000062f9.bin
391ee85c60a2efb073e58cceba90572c141207f16d45d877f39fd32b1f049829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F9 5520 bytes
font_01_sfnt_off000075ac.bin
90750d837e5c33ffa5a73865232c020e2ecd81f449101d201829b3d10f4fa946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AC 10608 bytes

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