Malicious PDF — malware analysis report

Static analysis result for SHA-256 44804cc75b8221db…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 07:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5b8ff6c4bdd6d1d7e682c72418c23a9 SHA-1: b27929b84534d59c62a7c75750494ae2dc9544cf SHA-256: 44804cc75b8221dbcf4461821c52f8573d069b1818a8a954bc219e78d7072478
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link, indicating a phishing or malicious redirection attempt. The document body text, though heavily obfuscated, contains the phrase 'national weather service app downloa' and the malicious URL, suggesting a lure to download potentially unwanted software or malware. No scripts were extracted from this sample.

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/wix?keyword=national+weather+service+app+downloa
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/303130707.pdf
    • https://cdn.shopify.com/s/files/1/0437/4318/2999/files/pronouncer_guide_spelling_bee_2018.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0093/files/mijifibul.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0714/files/56030725456.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/viwokotatojemud.pdf
    • https://static.usrfiles.com/ugd/b8c837_933b41b389ec4ecaa962cabb6d69992f.pdf
    • https://static.usrfiles.com/ugd/3aee12_4b04771c3733418ca5480f514e65260a.pdf
    • https://static.usrfiles.com/ugd/b42fd6_5c34011aae5d4ac9856cc25ca4c35574.pdf
    • https://static.usrfiles.com/ugd/4d400c_3dbcd492079a4b979b961224edf6c9c0.pdf
    • https://static.usrfiles.com/ugd/b11f6d_5281473e2ddc4416a09eaae9b629a23c.pdf
    • https://static.usrfiles.com/ugd/ae15ca_9abdc9e3e2564412bbce433a4c3c2551.pdf
    • https://static.usrfiles.com/ugd/b5aed9_12f981b07d8e429796857132b21ccb17.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0618a34573440f1a81cb9f089fdd66b.pdf
    • https://static.usrfiles.com/ugd/565485_5abe24df42fd407ab178abf8b244f2b8.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_off00005e25.bin
e86f46729e43ec3ac82f1ffd8548d074a22f7e9a05d28e5be7095afa1b315d1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E25 5072 bytes
font_01_sfnt_off00006f65.bin
19fb1b02bbe3e3e400af13238928dd48b98cb0ca552d3ce93a885ecfb2018cf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F65 10356 bytes
font_02_sfnt_off00009253.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9253 4324 bytes