Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8457089fbc44d1…

MALICIOUS

PDF

41.8 KB Created: 2020-09-16 23:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d7520c60afb8a4bab3af9fd88d69a52 SHA-1: 95808f6144177a264b99ace2b489874bc4f6b43c SHA-256: 9f8457089fbc44d197cf0c4085c6fa02c9196f9850ef7634d6ea383acb574019
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.me/wix?keyword=tigard+swim+center+%2528ttad%2529', points to known malicious redirector infrastructure. The presence of numerous links suggests a link farm or phishing attempt designed to lure users to malicious sites.

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.me/wix?keyword=tigard+swim+center+%2528ttad%2529
    • http://files.lightsoutlet.net/uploads/1/3/1/0/131070051/ruvolazowi-nijapijomapoxub-duvowun.pdf
    • http://ximakuwi.pitchesbecrazy.org/uploads/1/3/0/9/130969060/mivaxalanewi_fodemapu.pdf
    • http://nefolog.top500albumreviews.com/uploads/1/3/0/8/130874523/5312e813.pdf
    • http://wujafoj.jgapoet.com/uploads/1/3/1/3/131384380/bebawemefuvijaviduwo.pdf
    • http://fesuti.isateamenergize.com/uploads/1/3/1/0/131069910/3131038.pdf
    • https://16cc582d-36d1-457c-806c-a0df12241911.filesusr.com/ugd/974a4e_9a544e970191476d9e62436a181f670d.pdf?index=true
    • https://3e40ee50-765e-4b21-883a-263d431d5bf9.filesusr.com/ugd/682d1c_caa20960555d4af28b9f9040db2c13d0.pdf?index=true
    • https://fc917533-7dc0-49f2-b0e5-04c649359f92.filesusr.com/ugd/4b874d_5cccf342e73743b6bb5c7e20c6341da2.pdf?index=true
    • https://6f6f2d68-9f21-4b50-90b7-619121cba796.filesusr.com/ugd/34e21e_f9cf19f4d25143d2b5e6ed0d6bc2f54a.pdf?index=true
    • https://2aef8fce-6aec-44eb-917c-5d053da04bf0.filesusr.com/ugd/a6e5e9_3b2c67053d9a4b93aad3b8c34176e19d.pdf?index=true
    • https://0491262e-501a-4253-a6a6-190090d48b97.filesusr.com/ugd/c345b0_67925b7271a845f0adcf3961012d5930.pdf?index=true
    • https://2acb9ac1-c269-48f7-a2cb-7cfb182e0481.filesusr.com/ugd/70e5f7_d4d1e5b62a5241e89b5a9e3a0138a116.pdf?index=true
    • https://55bfa856-7879-42bd-9d9d-1fc6bfa8e893.filesusr.com/ugd/6f58fb_48ae8ed017324bc6bd46bed39789c6dd.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/4750/8385/files/teloviwugan.pdf
    • https://cdn.shopify.com/s/files/1/0465/3095/3366/files/96212015189.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/nipojajufesugixavupegude.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9803/files/40165601187.pdf
    • https://cdn.shopify.com/s/files/1/0462/4400/3989/files/20357532417.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/
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/nipojajufesugixavupegude.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648b.bin
4d276c53830c00e7180801472e173cdb2345791c81eea2fc62a79799b87ee15b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648B 5424 bytes
font_01_sfnt_off00007709.bin
dce98751190014aa2dbc5103116e27c3068fddc6c3f81b28ec67b1bf0539dfd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7709 10368 bytes

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