Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac0222489bf2d25…

MALICIOUS

PDF

40.9 KB Created: 2020-08-24 17:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed1b15ba06bee5975bb29efb69184494 SHA-1: 5b57ce4ace4c1fe9543582c61d484a55537d6b24 SHA-256: eac0222489bf2d250654843db00219e1ca85c428a52011692cebf7489f70ea8d
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.cc', suggest an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to software and a URL that aligns with the heuristic findings.

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=abbyy+pdf+transformer+plus+key
    • http://files.bittersweetbombshells.com/uploads/1/3/1/6/131636601/24137e9ea.pdf
    • http://ropavotuw.internetadvert.net/uploads/1/3/2/8/132814930/jebaluvawi.pdf
    • http://gapal.houseofcare.org/uploads/1/3/0/9/130969352/441122.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/rimuwon.pdf
    • https://cdn.shopify.com/s/files/1/0444/5303/6199/files/altium_designer_10_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/4233/2057/files/63015445030.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/mudenixuki.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/returute.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/17627265331.pdf
    • https://cdn.shopify.com/s/files/1/0429/9836/6367/files/housekeeper_cv_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0770/files/javascript_force_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/9132/0214/files/pupamodomibedek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/xusarudakidivewuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/68588178785.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/86315987363.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_off00005ffb.bin
3b5a14fb3e856bb1494ff508c72983dc443a5f37a3f21d851827742f1d18faff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFB 5480 bytes
font_01_sfnt_off00007286.bin
a9f9bb094f082017fbb7aa78e7a9b8511bafaf75110ad5e38a9fec1582d44781
pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 10604 bytes