Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba851654c6f475e…

MALICIOUS

PDF

36.4 KB Created: 2020-08-22 03:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 252ac3ba8eb4fbfbad9916d5b67ded4b SHA-1: d7973576d655300d94b13f80d2744dba9507a2ee SHA-256: eba851654c6f475ed9dab33dd94dfdd3b09ed75c22a79bada5c0da7a5f1e1bed
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'project escalation template'. This suggests a phishing or social engineering attack. The PDF also exhibits characteristics of a link farm, potentially for SEO poisoning or distributing further malicious content. The ML classifier strongly indicated maliciousness.

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/pify?keyword=project+escalation+template
    • http://files.crossroadschurchsc.org/uploads/1/3/0/7/130738914/18aee.pdf
    • http://vofiveg.hollarchiropractic.com/uploads/1/3/1/3/131380550/1508ee56ef32494.pdf
    • http://files.earthlycreations.shop/uploads/1/3/0/7/130775182/3122585.pdf
    • http://files.sittingtreefarm.com/uploads/1/3/1/3/131383424/dimoworirumori-bulobi-pinuge-bonowuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/xozilaguvul.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/federikexogopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/3497709087.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/que_es_una_bacteria_baar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/51257831372.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/sivupus.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_off00005202.bin
8661df9cf663e3deba806f93c8c8524ba62df07ae1ff901d9cde515c7a3b095c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5202 5156 bytes
font_01_sfnt_off00006373.bin
7f15675ece4c13e9dc0799be7388d067afd437a1c0329c431a95541dd6589696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6373 9920 bytes

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