Malicious PDF — malware analysis report

Static analysis result for SHA-256 908159eeb74f253a…

MALICIOUS

PDF

53.3 KB Created: 2020-08-19 06:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70c1d303297d7da2106e8c6d3ba86404 SHA-1: e55699aa9e87bd47dbbe56d366a76472f3dbc860 SHA-256: 908159eeb74f253acf0d4c77c576bd680f6eb51679c99d29b5c8cd6ac0ca8759
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The presence of a 'download button' lure further supports a malicious intent. The primary malicious IOC is the redirector URL, which likely serves as a gateway to a phishing page or malware download.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+assets+absolute+path
    • http://files.healthyhap-peanutrition.com/uploads/1/3/2/6/132681194/9058261.pdf
    • http://files.msbooksandart.com/uploads/1/3/1/3/131384442/vasuz-joxixelano-suzuxa-zugirom.pdf
    • http://files.outerbankslivemusic.com/uploads/1/3/2/8/132814826/04495a78d.pdf
    • http://jatuso.phusikosskincare.com/uploads/1/3/0/7/130738850/f2fe27c.pdf
    • http://files.optimisticliving.com/uploads/1/3/1/3/131380771/lujusaduzajeziw_kubelupig_zatetapapoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/gebowum.pdf
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/61058561646.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/37523118968.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/past_present_future_perfect_tense_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/66464667119.pdf
    • https://cdn.shopify.com/s/files/1/0449/8400/8862/files/juxotekegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/canaanites_history.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/kesibibisivuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7198/files/assessment_monitoring_and_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/sokutejizuzegeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/7966/1736/files/48067958179.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00007451.bin
6fdfbf7cfffe697bbcf48849188849f1480dfecdf34b4293f38a84bbd894e59b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7451 9244 bytes
font_01_sfnt_off00009309.bin
a8d3d277ed262d10129ceb0ad54305c6eda0babff12c2ab4b70688607861e908
pdf-font-stream PDF embedded font (sfnt) at offset 0x9309 5176 bytes
font_02_sfnt_off0000a491.bin
be5a02f6d80cdb6ec00a2e6cf114a3f438c3cd3dc3326b0fb475aa886cbf3320
pdf-font-stream PDF embedded font (sfnt) at offset 0xA491 10344 bytes