Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62216ce801aae99…

MALICIOUS

PDF

43.8 KB Created: 2020-08-21 04:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eee6c3924c818a2c0e3b561bd6f3ee06 SHA-1: 025c4fa12b2157805b0e8da34a3e06c103e3e520 SHA-256: a62216ce801aae99b722f6e0b9fccce7cbebac4b274d170f1d785d7b5405586d
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `https://ttraff.ru/pify?keyword=event+design+templates+free`. This suggests a social engineering tactic to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=event+design+templates+free
    • http://files.yogadiversityinitiative.org/uploads/1/3/2/6/132682790/2778805.pdf
    • http://danenuxo.laurakretz.com/uploads/1/3/1/4/131437064/2954171.pdf
    • http://files.carriagesatbriargate.com/uploads/1/3/2/6/132681901/guduxafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/23003956750.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/34734505129.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/24211633732.pdf
    • https://cdn.shopify.com/s/files/1/0434/4083/2678/files/attack_on_titan_game_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8969/files/mba_1st_year_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/xilopuneko.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/age_of_empire_3_android_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/zuzivorejodefen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/catalizadores_libro.pdf
    • https://cdn.shopify.com/s/files/1/0429/4954/2041/files/online_formatter_html.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/96504114863.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/latex_beamer_animation.pdf
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/clinical_nutrition_espen.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/nijumurig.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
font_00_sfnt_off00006329.bin
978b1fff259cad90ea1766d8502a5c784d3c0618e393aadb15fa4a01e8247cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 5380 bytes
font_01_sfnt_off00007562.bin
2b17894289ef4ac549ca5ccbfe538e6ebde94701791c0542cba9a71f2d67f349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7562 2268 bytes
font_02_sfnt_off00007f75.bin
ab5de993f099b7288fd7ed248f132c549015bcebeda8368970b2dd380ee4cf89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F75 10132 bytes

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