Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2ddaef2da6e15a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 04:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f8590c769e5c811b95099b3986f2e41 SHA-1: f1731dc3b52ea393e63c68e16ace7a62ddd27f78 SHA-256: 7a2ddaef2da6e15a9be0752ed33d4ba2814d45cc743178d49bfa31d8eb22f545
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=download+adobe+reader+for+windows+10', is flagged as a malicious redirector. The document body also contains this URL and text suggesting a lure for downloading Adobe Reader, indicating a social engineering attack. The presence of numerous other links, many pointing to Shopify, suggests a link farm used for SEO poisoning or distributing further payloads.

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/wix?keyword=download+adobe+reader+for+windows+10
    • https://cdn.shopify.com/s/files/1/0464/8117/8792/files/64456725138.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/bloons_td_5_apk_free_full.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/94697467025.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4b03884629341b3828cbef30e5734d5.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/sukix.pdf
    • https://cdn.shopify.com/s/files/1/0431/9677/6607/files/39731633149.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5109/files/wimusuzebiduribanuvesev.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/zizavukidujulin.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5135/files/62993143530.pdf
    • https://cdn.shopify.com/s/files/1/0462/3043/8039/files/32814049967.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/werewolf_game_cards.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_off0000591f.bin
caac1a9261ecdc23b536ca3f3fd00b13d391cd911444e0db3dfa6b38850d7752
pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 5032 bytes
font_01_sfnt_off00006a4f.bin
86807bbe67cd8d83d84ad0a4afe4e143b26e0b4d7f30a4e1e5fae863bd76b6c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 10416 bytes
font_02_sfnt_off00008d88.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D88 4324 bytes