Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c122ee8715410c0…

MALICIOUS

PDF

36.4 KB Created: 2020-08-21 17:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c1f455eaedc9ef2daed3486cf0bd56 SHA-1: 2ed6441fbc46808a18f022ed07e44336a5330575 SHA-256: 6c122ee8715410c0cd8e9beff997b8a4adc63feb1e034abd7d99a258a82c3755
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The presence of a malicious redirector URL, https://ttraff.cc/pify?keyword=bloody+roar+2++rom, strongly suggests a phishing or spamming campaign. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

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=bloody+roar+2++rom
    • http://files.smallbusinesscapitalus.com/uploads/1/3/1/6/131637723/xulifurokisuwe.pdf
    • http://files.bucketoblood.com/uploads/1/3/1/4/131438808/junix_ninani.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/tmux_split_vertical.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/julibedepo.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/honors_algebra_2_worksheets_with_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/pdf_on_antonyms_and_synonyms.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/blended_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/3369/8209/files/5825133129.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/levigivigukopunabejured.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/rudazerimobag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/petty_cash_advance_form_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/71268964968.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004375.bin
33be3bea59826bcf5a1330fd969fc0f25465542fd3f9436a02427ed9aa57d94d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4375 4512 bytes
font_01_sfnt_off000052bc.bin
6000981d52fc8a5271f054ddaea653a47ef2708ca242adfd684ec537f3ccf17c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BC 12056 bytes
font_02_sfnt_off000076fe.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FE 4324 bytes

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