Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a292129cf9cbb4…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 18:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 137e22f497632af360972b6104d502ea SHA-1: b3356beff61e20ee19145d64830a22e8caded887 SHA-256: 55a292129cf9cbb4adfa46a47cadb8c6ceb9ba4576e4cd185675a80cf0ccfbea
152 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing links to known malicious redirector infrastructure. It also contains a mass external PDF link farm, with many links pointing to shopify.com domains, but the primary redirector is ttraff.cc. The document body contains the URL that triggered the redirector heuristic, suggesting a lure to a malicious site. 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.cc/pify?keyword=bhangra+dance+performance+in+school
    • http://files.shadygrove71052.org/uploads/1/3/1/4/131484029/4394476.pdf
    • http://files.lifesadaisycakepops.com/uploads/1/3/0/7/130776449/saxolifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2037/files/fuxowusuteguluz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/pokemon_reborn_debug_mode_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/keranejunezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/83838291922.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/36189669978.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/vocabulary_for_ielts_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98774508290.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/98374573107.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/angularjs_viewer_demo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4683/7151/files/satan_libro_ego.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_off00006395.bin
d5611cd95fcbc1ceed98938bb95da3bc4235ff6fc0919beec2daa68f2bde08bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6395 5616 bytes
font_01_sfnt_off0000767d.bin
4b6d6700aec735e60b78e1816b044fdfc204e21034d7389a736eb716940ed6de
pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 10096 bytes