Malicious PDF — malware analysis report

Static analysis result for SHA-256 65aead2f8fb7ecdd…

MALICIOUS

PDF

32.1 KB Created: 2020-08-18 21:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 675780e1e7cf6ae29760e3d9ff3b3271 SHA-1: 3397a94173f811367d0dc841ec87ef6c7ae847b7 SHA-256: 65aead2f8fb7ecdd77fd2db8779e3a78eef1e3dab80550bb931452542132f4fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, identified as malicious. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. The document body, though partially corrupted, contains the malicious URL and appears to be a lure related to sports news, aiming to trick users into clicking the link.

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=memphis+grizzlies+injury+report+rotoworld
    • http://xakew.communitymidwivesofbrantford.ca/uploads/1/3/1/4/131453133/fimuweregipefej.pdf
    • http://files.champagnecircle.com/uploads/1/3/1/3/131383456/5cdfabb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2978/1918/files/la_campanella_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/watiguwonaluwevawok.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/megakurid.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/century_powermate_70_welder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/andrei_tarkovsky_time_within_time.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/damarerotuxokaxoniruk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/bediruwagamibapumugunen.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/babawigulekavawozu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/86444287308.pdf
    • https://cdn.shopify.com/s/files/1/0429/0818/8839/files/tojipiside.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041d0.bin
a8afa8f072382de0ae360680f0c6c27ffcd564cf89250d5021f395145b5af675
pdf-font-stream PDF embedded font (sfnt) at offset 0x41D0 5488 bytes
font_01_sfnt_off00005480.bin
ee019cb9bac3cff26aadba0dfb41910ec8bcd7084a2d0aecdda8225f75e49ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5480 9108 bytes