Malicious PDF — malware analysis report

Static analysis result for SHA-256 3296883f68cd19f3…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 00:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ef9ac9f2026ffe4e12ac6be5ced7d4 SHA-1: 1cc33a02fcd96cbfe3dee58f6a9c5f78e9342103 SHA-256: 3296883f68cd19f3e82276eb86153a524598ea8091fe8a34cf7a63eaa628e86f
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru', identified as a malicious redirector. The document body, though partially corrupted, contains text related to a 'blurred background camera app for android' and the malicious URL, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, but the primary malicious indicator is the ttraff.ru redirector. No scripts were extracted from this sample.

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=blurred+background+camera+app+for+android
    • http://likekebi.leecovet.com/uploads/1/3/1/4/131453540/6818121.pdf
    • http://tejafuji.frostwoodinteractive.com/uploads/1/3/1/3/131398024/e0d214b.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/85416884656.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0439/7151/0430/files/42523496512.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/zosabakesej.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/bless_the_lord_lyrics_and_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/vujevitotojifokumilese.pdf
    • https://cdn.shopify.com/s/files/1/0429/7470/7868/files/hardest_math_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/37023787746.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/pdf_xchange_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/union_city_last_stand_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/52772724511.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/63270278410.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_off00005ebe.bin
23bef9aef981c1dcee76aa8ef908610c151bc6f1b17231037e824350cdd6fba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBE 5548 bytes
font_01_sfnt_off00007188.bin
5017bd2f17d7d20ceb03e6fdef38a02065781e1410f9737f1c2be58e0c2f0fc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7188 10196 bytes