Malicious PDF — malware analysis report

Static analysis result for SHA-256 5909dd15f67bdad1…

MALICIOUS

PDF

51.3 KB Created: 2020-07-25 00:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b97b1d9c0aeced67f1d009e6fb37f56 SHA-1: 603abb3510a9a140c7d6bf93cb2b8b920057b128 SHA-256: 5909dd15f67bdad19bf743f0801cd606d32919c671ecd631c36263ad2a6b35bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to a medical condition, likely to trick users into clicking the malicious link. The presence of multiple links, including to 'cdn.shopify.com', suggests an attempt to obscure the final malicious destination or to appear as a legitimate link farm.

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=accidente+cerebrovascular+hemorragico+fisiopatologia+pdf
    • http://files.ishypnotherapy.com/uploads/1/3/1/8/131858287/jujagevobesadeb-pogasovat-saxomem.pdf
    • http://files.kayliquirk.com/uploads/1/3/0/7/130775063/69ba38.pdf
    • http://files.balancedbooksbybruce.com/uploads/1/3/0/9/130969993/595661ae.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/27099886544.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/bixanotovudovapigabib.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/zopugelutegovadojadazuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/binuginopaxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3549/0461/files/10998304915.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/zumavuboroligavij.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/zosorimegusojovivepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/70663960888.pdf
    • https://cdn.shopify.com/s/files/1/0435/9811/9071/files/gikokigexakizawobu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/43800580419.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/zuwawewod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/ketewafonujejaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/rubewijogesamonavurires.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_off0000896c.bin
220ce76283ccb8ac9731dc612ead394ef384f98f793cfa10407fb3a383322e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896C 5640 bytes
font_01_sfnt_off00009c62.bin
722bbe4e166b4c39b516044008071a1939a59d7030e1b1b853357b8315d8e9d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C62 10232 bytes

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