Malicious PDF — malware analysis report

Static analysis result for SHA-256 be488b496a3da0d0…

MALICIOUS

PDF

33.7 KB Created: 2020-08-24 03:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 243de4c5dbf1fb2da7dae8417150a43e SHA-1: 6c96c0afcd184c0383889ffc6daa58f04fdb90e6 SHA-256: be488b496a3da0d09865194eefa96064821b6034694d6491c39464ce7e479cb2
154 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.cc/pify?keyword=3m+adhesion+promoter+111+datasheet, which likely serves as a lure or initial stage for further malicious activity.

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.cc/pify?keyword=3m+adhesion+promoter+111+datasheet
    • http://files.saintlouisspeed.com/uploads/1/3/0/8/130813509/mupajazute.pdf
    • http://xokono.vitalhealthwoodstock.com/uploads/1/3/1/6/131636665/pekaxotujasira.pdf
    • http://files.learningtoreadbyreading.com/uploads/1/3/0/9/130969220/5078657.pdf
    • http://files.mushinworks.com/uploads/1/3/1/4/131453733/1424655.pdf
    • http://divudazav.imagesbya2zphotography.com/uploads/1/3/1/8/131856190/luwakujima_roxubixakeva_botazawu_xubajereramape.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/99992100989.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/rogudamodo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/ajax_full_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/70254830955.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/beroxijatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4550/files/nesterj_nes_emulator_psp.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/mitemanat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/70253365881.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8103/files/davis_carvedilol.pdf
    • https://cdn.shopify.com/s/files/1/0439/4103/6200/files/semezoniduvigomorepoxivi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/55194244207.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/dermatitis_atopik_bayi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1620/9059/files/app_hack_clash_of_clans_android_2015.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_off00004707.bin
ad5998b54eaca216424329378fc7e9d0f3c269c319ddefd90914935b5e430bdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4707 5288 bytes
font_01_sfnt_off000058d6.bin
819393f474dd789ad91b436363a22cde3b6a19deae331bd4cdda193b2ffa20b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D6 9232 bytes

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