Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd9efc209dfdcda…

MALICIOUS

PDF

33.7 KB Created: 2020-08-10 10:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eec0fa7d5dc375789ba60106820fd5be SHA-1: dafee904a025cff971bf792e5683c1de2e6a6513 SHA-256: edd9efc209dfdcda958467d5472d32d965da9d36e9771c6b0c95f034ba839d1b
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, many of which point to a redirector service known to host malicious content. The document body itself contains a URL that is also flagged as a malicious redirector. This suggests the document is designed to trick users into visiting malicious websites, likely for phishing or malware distribution.

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.cc/pify?keyword=konica+minolta+bizhub+c454e+manual+pdf
    • http://files.m.geoffgoodsonhorsemanship.com/uploads/1/3/2/6/132695387/kapisemufupo_ketejapojejuz_zajev_vagadoxibesu.pdf
    • http://files.tompigotpaintings.com/uploads/1/3/2/7/132740804/sokufoja.pdf
    • http://widovebe.charioworld.com/uploads/1/3/2/8/132816066/dobilizepuje.pdf
    • http://files.aspectsandangles.com/uploads/1/3/1/4/131406149/ff65f8e9dac6.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/47547367184.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/52032741036.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/ccna_routing_labs.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/joxewegilikobotokoraxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/pefutufurona.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/nibuxejoxalakored.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/pekedomaduniraduvosag.pdf
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/7323518877.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/97193600198.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/39682944266.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_off000046b1.bin
db5f0f725198c0b638169c5387a511c4a381219d842d9a80f73acf2f736c2952
pdf-font-stream PDF embedded font (sfnt) at offset 0x46B1 5492 bytes
font_01_sfnt_off00005958.bin
4744b1d0d143b5ae5df7c3b9a814ffe16b281d82116093061c6da852a513a5da
pdf-font-stream PDF embedded font (sfnt) at offset 0x5958 9504 bytes