Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f562281715bd8f…

MALICIOUS

PDF

48.9 KB Created: 2020-08-22 13:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9156d9aa4a5105ff8cc3d9a5ec22d917 SHA-1: 7c6e710dbe3303fda85e48cf19645fafadf9294f SHA-256: 74f562281715bd8f7309f3d1dc060fe99f4592ca711d882d7b5c402d316cb899
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'free html5 templates' and the malicious URL. The presence of multiple Shopify links suggests an attempt to blend malicious links with seemingly benign ones, a common tactic for link farms or SEO manipulation.

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.com/pify?keyword=best+html5+templates+2018+free
    • http://files.herecomesthyguide.com/uploads/1/3/1/4/131453022/eaebc6b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/acca_past_papers_f9.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/segezabuvem.pdf
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/53828037777.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/bisukizasibusokeganifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/wanub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3737/6157/files/19465888551.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/57570407211.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/16155858300.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/tnt_song_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0464/5175/3128/files/cannot_format_change_card_canon_5d.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/bivelakopimulupagimosulat.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/sikofubiziwipidum.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/mufaxoloworewavikur.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_off00007421.bin
7760107c358dd58a7cf2a47b3317f22b2f26900871169aa8cc68f6d7a7f09149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 5360 bytes
font_01_sfnt_off00008653.bin
6975fb20fafc665efb2f049a390955a088eb72c84db7f00126b0d51d5a239e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8653 10016 bytes
font_02_sfnt_off0000a89f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA89F 4324 bytes

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