Malicious PDF — malware analysis report

Static analysis result for SHA-256 32656c5d732256c1…

MALICIOUS

PDF

63.6 KB Created: 2020-08-05 14:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30a380d8f7307a4d91800c20ad8a5dd2 SHA-1: 0e5e47f7fc6b423aa22f0fb353de71a2a7c5d16b SHA-256: 32656c5d732256c1d70fe486f8052812b54f0918bffb5498e195ca53fe3d0a9f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=capillary+action+in+plants+pdf'. This URL is embedded within the document body, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify this as a phishing or redirection attack.

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=capillary+action+in+plants+pdf
    • http://files.learning-detours.com/uploads/1/3/1/4/131406222/bixefalimak.pdf
    • http://files.haralsoncountyhistory.com/uploads/1/3/2/3/132302913/4438840.pdf
    • http://files.mygreenage.com/uploads/1/3/0/8/130814355/916560e4151353.pdf
    • http://files.bettybivinsedwards.com/uploads/1/3/0/8/130874642/lakikimosuweg.pdf
    • http://files.lauraswinkfineart.com/uploads/1/3/0/7/130740624/mugaxanizivasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/23655014243.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/26570836665.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/kemesaletusoxonexalo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/abdc_season_8_episode_4.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/ruwesevutilodopojilazatug.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/38254034274.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/ion_cation_y_anion.pdf
    • https://cdn.shopify.com/s/files/1/0428/9059/2422/files/babycakes_cake_pop.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/19925526918.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/31240201467.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/mojom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a651.bin
d9d6c42bc035b1b076350dcabd10c8731bd7051513e6ebc60a4a4d8d3493816b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA651 5156 bytes
font_01_sfnt_off0000b7ec.bin
46935e0dffc109d6ddd36a4e3f8d98cd92598e43ab9b8d421321050d28847677		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EC 10708 bytes
font_02_sfnt_off0000dcaf.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAF 16036 bytes

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