Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce663b9ec8b6cf5…

MALICIOUS

PDF

48.9 KB Created: 2020-08-24 13:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1faa76b12bd0e3ee68057440ad86d215 SHA-1: 0f4df44d14530f8ac21d1c72c2be64457d88282e SHA-256: fce663b9ec8b6cf531e062218b343b271d04168980342b29dfab04ba0b979b08
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body text, while partially corrupted, includes the same URL, suggesting an attempt to lure users to malicious content. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a probable phishing or malware distribution attempt.

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=allergic+reaction+to+brand+new+bed+sheets
    • http://files.joyfuljourneystravel.com/uploads/1/3/1/3/131384335/dodavetaxozif_dopuko_boravedod_xetitagetil.pdf
    • http://jezedo.simonesfitfunlife.com/uploads/1/3/1/1/131164250/kudixaxaniwe-woxuxevemisef-sufimofunilibep.pdf
    • http://files.elliekilpatrick.com/uploads/1/3/0/8/130814874/balevodut-ruzoporupa.pdf
    • http://xolewe.rudycaseres.com/uploads/1/3/0/7/130776436/malajomagijorex_tosag_karosanuvoka_revev.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/british_accent_training_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0457/3544/4646/files/bluestacks_pc_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7932/files/82867302852.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/pezovuralaseluripelun.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/gibipirudipegipano.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/mivirowuwobuwuzepofer.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/86897034841.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/tecumseh_carburetor.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4797/files/basic_learning_computer_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/36571939239.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/gomaloterakizapun.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fa7.bin
426fbe9521c5e77e7cd80f0f860cb0ad397e1b5d2148d25ae9452511738a049b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA7 5424 bytes
font_01_sfnt_off00009212.bin
2602f1b3be5b8306ce4a4b7d0ab1616c78d002b55e109206528b1ad4496165f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9212 10704 bytes