Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f00215758fab2a…

MALICIOUS

PDF

43.6 KB Created: 2020-08-25 04:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d42b6f3f09b25fb30b86c1caaaa9ead SHA-1: f1fac4576c3ebb5ccc81465b6ec9b4700fe0f3aa SHA-256: 01f00215758fab2a0b955a8754c4c8fc8964b3eca29425e1bf7f9e6dc97a5e5d
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing pages. The document body, though heavily obfuscated, contains a URL that points to a redirector, and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this. The presence of a large number of external PDF links also suggests a link farm, potentially for SEO manipulation or to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hays+salary+guide+russia+2019
    • http://files.houseofsweden.us/uploads/1/3/2/8/132814476/4405136.pdf
    • http://files.alkhomassia.com/uploads/1/3/1/4/131437064/nonapibojufop.pdf
    • http://mewogaj.brunstaneproductions.co.uk/uploads/1/3/0/7/130739720/vagitepinagapi_pelakuwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/5942288446.pdf
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/bass_guitar_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/7033/8725/files/shooting_games_apk_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/43310240446.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/cachaza_de_caa_de_azucar.pdf
    • https://cdn.shopify.com/s/files/1/0437/3682/6007/files/brown_skin_girl_wizkid_beyonce_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/76536730000.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/29833843691.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/97388704115.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7539/files/71925083804.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/rutamebe.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_off00005d23.bin
8da8fb1a009cdb0bbd95471bc7a2609ab9b06d363105619e0d2ce493ea0aca81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D23 5536 bytes
font_01_sfnt_off00006fff.bin
bda46a189ab5ca82e9a2dfbdd44eacc5857f8d08cd207523bdafa5b6a969d3e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFF 2504 bytes
font_02_sfnt_off00007ae2.bin
b55b7afead85b381d07154aab45bfe98418a94cfe83438fde30a4ce4c12e3c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE2 11844 bytes

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